Yup. To correct/update a memory location, you first update the settings manually and then save over the current memory location. To use your example of needing to turn off repeater shift for a memory location, just hit SET (middle button) and turn the main dial knob until you get to #33, RPT.MOD. Press the dial knob and then turn it to select OFF. Press and hold the dial knob for 1/2 second to save and exit the menu. Finally, hold down SET until the memory location number starts flashing then turn the dial knob to the channel number you want to update. Once you're on the correct memory location hit SET again to update it. This bit is on page 34 in the manual. I find the memory setting/updating process a little tough to remember because I don't do it very often. Our local ARES group requires that we're able to manually program our radios on the fly so at least I get to practice a few times a year. You can also change other settings like power level and tone encode/decode and those will be saved along with the repeater offset or lack thereof. Since you're working simplex you might not need to encode a CTCSS/DCS tone. My FT-8800R scans noticably quicker on channels that do not have a tone squelch set. Good luck!